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- W2950775521 abstract "The 30-nm fiber is commonly formed by oligonucleosome arrays in vitro but rarely found inside cells. To determine how chromatin higher-order structure is controlled, we used electron cryotomography (cryo-ET) to study the undigested natural chromatin released from two single-celled organisms in which 30-nm fibers have not been observed in vivo: picoplankton and yeast. In the presence of divalent cations, most of the chromatin from both organisms is condensed into a large mass in vitro. Rare irregular 30-nm fibers, some of which include face-to-face nucleosome interactions, do form at the periphery of this mass. In the absence of divalent cations, picoplankton chromatin decondenses into open zigzags. By contrast, yeast chromatin mostly remains condensed, with very few open motifs. Yeast chromatin packing is largely unchanged in the absence of linker histone and mildly decondensed when histones are more acetylated. Natural chromatin is therefore generally nonpermissive of regular motifs, even at the level of oligonucleosomes." @default.
- W2950775521 created "2019-06-27" @default.
- W2950775521 creator A5039374024 @default.
- W2950775521 creator A5040142346 @default.
- W2950775521 creator A5061099924 @default.
- W2950775521 creator A5062265481 @default.
- W2950775521 creator A5063253432 @default.
- W2950775521 date "2018-07-01" @default.
- W2950775521 modified "2023-09-29" @default.
- W2950775521 title "Natural chromatin is heterogeneous and self-associates in vitro" @default.
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- W2950775521 doi "https://doi.org/10.1091/mbc.e17-07-0449" @default.
- W2950775521 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6080658" @default.
- W2950775521 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/29742050" @default.
- W2950775521 hasPublicationYear "2018" @default.
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